async function async1() {
    console.log('async1 start');
    await async2();
    console.log('async1 end')
}
async function async2() {
    console.log('async2')
}
console.log('script start');
setTimeout(function () {
    console.log('setTimeout')
}, 0);
async1();
new Promise(function (resolve) {
    console.log('promise1');
    resolve();
}).then(function () {
    console.log('promise2')
});
console.log('script end')